Phase compensation film

Abstract

The invention discloses a phase compensation film, which is made through cleaning, vacuum evaporation and drying. A film layer sequentially comprises a first zirconium oxide layer, a second silicon oxide layer, a third zirconium oxide layer and a fourth silicon oxide layer from an optical substrate to the outside. The film is coated by using a domestic vacuum coating machine, an irregular film system precisely calculated and design is adopted, the composition, the geometric thickness and the physical thickness of the film layer are organically controlled, and the luminous reflectance of a coated antireflection film layer within 420-700NM is enabled to be less than 0.5 percent; the light of a spectroscopic film can penetrate and the inverse ratio is less than 3 percent; the reflectance of a medium high-reflectance film reaches 99.9 percent, the number of coating layers is reduced to four from tens of layers which are coated by using an imported device, and the number of coating materials is reduced to two; and the surface of an optical element coated with the film has the mould-proof and anti-fogging functions. The invention changes the coating method of the optical element film, facilitates the popularization and the application of the domestic coating machine, improves the element added value and has a great significance on the quality improvement and the mass production of the domestic optical instruments.

Description

technical field [0001] The invention relates to an optical antireflection film, in particular to a phase compensation film. Background technique [0002] According to the requirements of the application, high-end optical instruments need to increase the light energy transmittance or divide the light beam in proportion according to the use requirements or refract the light path without losing light energy, especially in the rear projection imaging system, this requirement is relatively higher: The broadband anti-reflection wavelength requires high transmission in the range of 420-700NM, and the light reflectivity should be less than 0.5%; the reflectivity of the dielectric high-reflection film should not be less than 99.9%, etc. Therefore, to meet this requirement, optical components must use Japan Or high-end coating machines from South Korea or other countries to coat optical components with thin films. This type of coating machine has good repeatability, and can use sever...

AI Technical Summary

Problems solved by technology

Due to the poor repeatability and stability of domestic low-cost coating machines, it is impossible to complete dozens of layers of coatings, resulting in the low-end level of optical imaging products in my country. If you want to use high-end optical instruments, you must import complete machines, components or imported coatings from abroad. machine

With the rapid development of optical technology, rear projection imaging technology is also booming. Its core component - optical engine (especially the color combination prism) uses many optical components, and there are many types of corresponding films, so the whole machine must be imported from abroad. , components or imported coating machines, greatly increasing the cost, while restricting the development of domestic optical technology

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